Z8S18033VEG

Overview

The Z8S18033VEG is a static microprocessor based on the Z180 architecture, manufactured by ZiLOG. It features an 8-bit data bus and operates at a maximum clock frequency of 33 MHz. The device is housed in a 68-pin PLCC package with surface mount installation. It requires a 5 V operating supply voltage and supports an industrial temperature range from -40°C to +85°C. Key integrated resources include two DMA channels, two asynchronous serial communication interfaces (ASCI), two programmable reload timers, and a clocked serial I/O channel.

Feature Summary

• Code compatible with the legacy Z80 CPU while providing extended instruction sets and enhanced performance.
• Includes two chain-linked DMA channels for high-speed memory and I/O transfers without CPU intervention.
• Features multiple low-power down modes to reduce energy consumption during idle or suspended states.
• Integrates on-chip interrupt controllers and wait-state generators for flexible system timing control.

Applications

• Industrial control systems requiring robust processing and wide temperature tolerance
• Embedded applications utilizing asynchronous serial communication protocols
• Systems needing direct memory access capabilities for peripheral data handling

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to end-of-life status. Confirm RoHS compliance details and moisture sensitivity levels prior to soldering. Ensure storage conditions meet humidity requirements to prevent damage. Validate pin compatibility with existing PCB footprints before integration into new designs.

Selection Notes

Select this model when backward compatibility with Z80 software is required alongside modernized I/O peripherals. Consider the 33 MHz speed and 5V logic levels for systems not yet migrated to lower voltage standards. Evaluate the PLCC-68 package constraints against available board space and assembly equipment capabilities.

Part Context

This component belongs to the Z8S180 series, which enhances the original Z80180 design with improved execution speeds and power management. The series maintains object-code compatibility with Z80 devices while adding features like expanded MMU addressing and ESCC-like baud rate generators for advanced serial communications.

Replacement Considerations

Public confirmed substitute part numbers are not available as the Z8S18033VEG is listed as End of Life. Designers should evaluate newer microcontroller families that offer Z80-compatible cores or migrate to alternative architectures with similar I/O configurations.

FAQ

Does the Z8S18033VEG support dynamic RAM refresh?

Yes, the device includes DRAM refresh functionality controlled by the CPU, indicated by the REF signal during memory cycles.

What is the function of the CSI/O channel?

The Clocked Serial I/O (CSI/O) channel provides a half-duplex serial transmitter and receiver for high-speed data connections to other processors or computers.